Rename "pathos" package to "path".

sdk/lib/_internal/pub/test/deploy/reports_dart_parse_errors_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:pathos/path.dart' as path;
+import 'package:path/path.dart' as path;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
 
   integration("reports Dart parse errors", () {
     // Dart2js can take a long time to compile dart code, so we increase the
@@ skipping 25 matching lines @@
     d.dir(appPath, [
       d.dir('deploy', [
         d.matcherFile('file.txt', 'contents'),
         d.nothing('file.dart.js'),
         d.nothing('file.dart'),
         d.nothing('subdir')
       ])
     ]).validate();
   });
 }